Journalartikel

Jahr der Veröffentlichung: 1998

Seiten: 168-189

Zeitschrift: Nuclear Physics A: Nuclear and Hadronic Physics

Bandnummer: 634

Heftnummer: 1-2

ISSN: 0375-9474

Open Access Status: Green

DOI Link: https://doi.org/10.1016/S0375-9474(98)00135-3

Verlag: Elsevier

Abstract: 
We present a dynamical study of e(+)e(-) production in C+C and Ca+Ca collisions at BEVALAC/SIS energies on the basis of the covariant transport approach HSD employing momentum-dependent rho-meson spectral functions that include the pion modifications in the nuclear medium as well as the polarization of the rho-meson due to resonant rho-N scattering. We find that the experimental data from the DLS Collaboration cannot be described within the rho-meson spectral Function approach. A dropping eta-mass scenario leads to a good reproduction of the DLS dilepton data, however, violates the m(T)-scaling of pi(0) and eta spectra as observed by the TAPS Collaboration as well as eta photoproduction on nuclei. (C) 1998 Elsevier Science B.V.

Harvard-Zitierstil: Bratkovskaya, E., Cassing, W., Rapp, R. and Wambach, J. (1998) Dilepton production and m_T-scaling at BEVALAC/SIS energies, Nuclear Physics A: Nuclear and Hadronic Physics, 634(1-2), pp. 168-189. https://doi.org/10.1016/S0375-9474(98)00135-3

APA-Zitierstil: Bratkovskaya, E., Cassing, W., Rapp, R., & Wambach, J. (1998). Dilepton production and m_T-scaling at BEVALAC/SIS energies. Nuclear Physics A: Nuclear and Hadronic Physics. 634(1-2), 168-189. https://doi.org/10.1016/S0375-9474(98)00135-3